Improper use of hydraulic pump Accident to keep in mind

At 0:33 on April 18, a deep-space rescue race against time began at the construction site of Wangcheng Construction Company near Kunming Prison near Wang Bridge. It is understood that when workers at the construction site operated the hydraulic pump on the edge of the deep well, three working workers fell into the deep well due to excessive pressure on the hydraulic pump. Two of the less injured workers were rescued by other workers There is still one more serious worker trapped underground.

The reason leading to this accident is due to improper operation of hydraulic pump caused by staff, the accident also brought a wake up for mechanical operators, mechanical operation can not be ignored, a little careless will lead to major accidents. Let us focus on the use of hydraulic pumps.

How to use hydraulic pump

Hydraulic main efficiency of the system depends on the volumetric efficiency of the hydraulic pump, when the volumetric efficiency dropped to 72%, you need to repair, replace the bearings and aging seals, to be more than the super repair or for the gap with friction , So that its performance has been restored.

1 hydraulic pump oil supply form

Straight shaft swash plate pressure for the type of self-priming oil pump plug force two. For large pump pressure liquid pressure oil tank are used, there are hydraulic pumps make up with the sub-pump to the hydraulic pump inlet pressure of the liquid oil-based oil sucked. Pump self-priming oil capacity is strong, no external oil supply.

After the tank oil starts the machine for a second time, it is necessary to wait for the hydraulic magazine to reach the back pressure to operate the machine. Such as the gas tank of the gas load on time enough not to pressure machine, the hydraulic pump will be made with the slip whip, like the current pull-out will cause the pump body within the return plate and plate non-mining. Damage is often filled with oil pump piston pump, the use of 3000h, the operation on the daily piston pump inspection 1-2 times, check whether the hydraulic pump sound transmission normal. If you find that the hydraulic cylinder speed decline or boring the should, the car on the pump disintegration inspection, check whether the edge of the impeller scraping is like, whether the internal gear pump clearance is too large.

For self-priming fluid, the oil in the plug-type pressure tank shall not be lower than the lower limit of the fuel gauge to maintain the hydraulic oil quantity and quantity. The more fluid cleanliness of the pump fluid, high life expectancy.

2 hydraulic pump bearings

Piston pump is the most important part of the shaft bearing, if the bearing appears clearance, you can not guarantee that the Department of internal pressure fluid permit three pairs of normal wear vice, but also Vice-rub each broken broken hydrostatic bearing film thickness , Reduce the piston bearing bearing pump life. According to the information provided by the hydraulic pump manufacturer bearing shaft, the service life of 10000h, more than the need to change the value of the new port.

Shaft to unload bearing, there is no professional testing equipment is unable to detect gap travel bearing out, can only be used for visual inspection, such as roller table change or mark scratching look, it must be replaced.

In the more should be replaced when bearing bearing the original bearing the English letters and models, the column bearing bearing large bearing capacity with large bearing capacity, it is best to buy the original rules of the original factory products, if the replacement of another brand, There should be a bearing on the experience of teaching staff look-up table swap, the purpose is to maintain the same degree of precision bearing-level and load capacity.

This article Keywords: pump

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